Cyber criminals often send fradulent email or text messages, or call and claim to be from Microsoft, Apple, your anti-virus company or internet provider. They may even setup fake online pop-ups with warning messages to call and get the "issue" fixed. They offer to help solve your computer problems, or sell you a software license.
Once they have access to your computer, they could retrieve your online banking usernames and passwords, credit card numbers, and other sensitive personal or financial information.
Remember: Microsoft, Apple, your anti-virus company or internet provider will never proactively reach out to you to provide unsolicited technical support. Any communication must be initiated by you.
Here's what you can do:
1. Never give control of your computer, or your credit card information to someone who reaches out to you unexpectedly.
2. Tell a friend. You might know these email/text messages or calls are fake, but chances are you know someone who doesn't.
Source: The Federal Trade Commission